Thanks! I think I liked the previous ones a little better, if only for the D.va at the end, but I edited this together because of the Tracer calling bullshit was very amusing to my friend and I.
Once you chain them you need to left click and melee asap, ideally you should also walk forwards a little but I often don't. It should do 200 damage before they leave the stun, but if they're mashing an escape sometimes they'll get away (like the Reaper).